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Advent calendar 2015
8 December
All 2015 advent puzzles
~
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What is the largest number of factors which a number less than a million has?
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720720 has 240 factors.
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List of all puzzles
Tags
cubics
axes
chocolate
digital clocks
chess
sport
number
elections
complex numbers
matrices
cards
parabolas
doubling
ellipses
geometric mean
binary
triangle numbers
squares
consecutive numbers
coins
bases
routes
perimeter
consecutive integers
multiplication
crosswords
division
trigonometry
the only crossnumber
ave
lists
geometry
graphs
dice
time
sums
christmas
cryptic clues
polynomials
sets
differentiation
digital products
shapes
tangents
money
prime numbers
partitions
irreducible numbers
symmetry
integration
pentagons
square numbers
square roots
algebra
mean
taxicab geometry
xor
odd numbers
square grids
remainders
shape
star numbers
floors
sequences
albgebra
angles
median
hexagons
dominos
digits
circles
addition
speed
factorials
polygons
sum to infinity
integers
determinants
dodecagons
probabilty
spheres
scales
area
games
rectangles
clocks
decahedra
fractions
triangles
powers
logic
percentages
cryptic crossnumbers
balancing
regular shapes
arrows
even numbers
books
functions
gerrymandering
unit fractions
grids
planes
multiplaction squares
multiples
dates
palindromes
tournaments
colouring
indices
neighbours
chalkdust crossnumber
quadratics
pascal's triangle
wordplay
tiling
folding tube maps
people maths
2d shapes
coordinates
expansions
products
quadrilaterals
factors
volume
means
rugby
proportion
probability
3d shapes
combinatorics
numbers
lines
averages
prime factors
perfect numbers
menace
crossnumbers
cube numbers
calculus
surds
medians
range
geometric means
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